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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '222552f7a287f6391ccbc098aa1d99c60513014acf2db0e49e3ee267e5ada639' 
  AND token = 'ashggypGH8KIozSey1ilBC7fjTr4UEagOcw5Pu5Ep5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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