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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ba00997cc900d8340692abb5402bbbc8c569c61d5bc9f9fcf59170585b31467' 
  AND token = 'czbWqaOKvfm0Qb5SqGtPFrHmdgG2ToZIf5mq2CkoFRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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