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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01daef7868fdf5c981bd7f19ceb277fda9665f98fada015eb5769681cb0c99b6' 
  AND token = 'j+SCWOD/dsWB/tluNMJnqrplnoUn+ITJrHwPld4aC2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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