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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1caaab45f08348a34d001d72624bfb07236a142df08a68448ae36e37c8da0bf4' 
  AND token = 'yCHlxRDgS9OEGaRIAtdbmzF4u3HMF5UH4s6NClxOxO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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