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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb32c172bc1d86a9c4f4a9bcde51c4498545e3a7ca1166e2d1d2c163dd2c5a52' 
  AND token = 'MrGb0/jqZu7un2kIsgT5hhQF3aBAdU+8lne3iesQAQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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