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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faa8f3ecc7524a11a22b831f2c0fd9d5dd178cbfa128e6ffff146ac8a1468179' 
  AND token = 'CZVA6VJPFEKkIb86taXLuSZjsB8VFJJ7j+tvTJ4lbtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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