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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05028abbc22776b008a2d50adc74fd09e7273bf87e32f0d475dfa34cb65522e1' 
  AND token = '1STfBuDa2rpeKRF6HlVBdhDUTD0HfOOtRRB9u6GllKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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