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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb7bf9578e266ae91b8e8def735d2cc374ebc7b8b629f83458c8a47c32b0e70c' 
  AND token = 'tASS3N/kMBB5XLIAMpB0gOR2J4r7zoi0+EryaI2163U=' 
  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"
    }
  }
}