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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06250de106e4b48d922ccc3cca140bf9ac6483f998f7f2020dfa5b5a54e0ec52' 
  AND token = 'LCH6BCTD9v5cOu3OTZDtLs7v7RFJhUXAs4BZh3gTU+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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