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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7447a396f3168dc84837361919c9d691a0645d8ca1f97d565536961fa1b62c59' 
  AND token = 'CSo7LTZ1srqcWz8PandeqBiea6jtNQeYJCG1h++ib4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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