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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee48c4015b06bcfb5aa501c831a440e8c58155a329940b912fdb54c2feaffd95' 
  AND token = 'wMnbZFzlxoH4qNPf+IU78SsFEIXPcw8e5eRJQUeWcF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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