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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca618e62353bdc2e676bf3423c97e0a35fc7e1407461cc138ce43166e42991b7' 
  AND token = 'IJxrJH1aLp88YLksZQwmfV8NrwD0FKu5dOj4FCHAXmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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