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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25a8fcb9b1ca54ce78dbaa6fac7219874150c63bac814683bf06c1253ee7851f' 
  AND token = 'envxwJTicheo424YJPEAJpXz3LW7IMP062QByjk8AU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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