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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fc544110dcf1be926dda45b16f33c75b26c1253831de78e5f8a88a2574ecdfd' 
  AND token = 'o9m/uuo8h4Ld7/5Z7lZlAKirrWady1s/KDwoLxDtFf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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