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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05812de1592c24bd6b937c4ecae44b3a0bf9cebb563c49e0c76e98fc58d58814' 
  AND token = 'gzbaO3tfWseCtnqEru2UJPkNdQkZHCxxhdZt+Oj3E0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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