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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '060e915735fe795095a941f7ea89a44caaa04eb7bc3ed6efb4419b09d2808fea' 
  AND token = 'JLOn6qVrrGkfJuKMg2+AJ9K6iFgyMvNi2L3yET/OG0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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