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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d2991e0da83895e084147aed427b48b78519de01a08ad41dba6b0c5dde3f3cc' 
  AND token = '5iYYi1agmz04hmAJaNFiyTGdgnJmA1GF6Fcsy4kpEOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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