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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c4709f74f62a50f89d2b39e0350323006eebbf185dea840c0b9c51e45ef0074' 
  AND token = 'GimA2d4J8bHi4anIynCGykMNDeGROhba1+33Qi4F03o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}