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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26725e237edf64f90280b04b28111143258d1f0d2ea341c31ae03227c69eddd5' 
  AND token = 'Rh0TI30eGzziOod1jKreXkjhX+WzKqQimt5NxpvXU9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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