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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d805c348908a073a320212b861f3f6aa1d532c00c10bba806a58021dbfc0cb5' 
  AND token = 'AtsYXwpGKiZD7wJJ/2EYfIEXHIQzr8Pnhes/wskVpIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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