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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2eadd93778061d20c88c9a4e396d12a77bd2e03726b35232636ec229dd6fb00d' 
  AND token = 'Kr9P2Qo0fIiZJvoVIXb0ILeGuK8/4cztaYSAOVVoPpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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