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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'af62da6606f238a11b18453751751f508fac179146fd3ca9560460c6761d6f54' 
  AND token = 'qeOAZ8LGAqlFVP2gd7GwtmggL0a9JWEdbNFHTLbC9f0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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