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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a860c9aabdf61d96a0fcf9e448aea7c7898175082a735216cc4a0b685184945' 
  AND token = 'ZFmOw9AC8EIFyu69YpJrw8eUmUo9oK6V6kJ+n71eMyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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