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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccbd7a569dd70d2d36e681824a274d800128b871e129d0bd31aeef5797abba2f' 
  AND token = 'yy1F1XOkXfDMHzS3OjWceHnkxE2sSpH90aDXezXsw5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}