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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40b563bba6f9132b6625573023af49aabda5291bc30a4113c6daa967d2d49510' 
  AND token = 'HyfZAuLzNcV/o+OJeZSTAnZDq1PqqJeYSpf9jsAjTqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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