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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1614ff08a7b987cc38ddb2ad1ed8ee06037da8df16c4b95636e172763e2fdf64' 
  AND token = 'xHDc7Rcm7r4YG0ltmKUE3uFDBOiCrSF2OD6mYdqGZ1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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