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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b05868a2cced04bc12205f2b0370182a6ebbfaded1f82ac0f68f6eb7e6dd6b1e' 
  AND token = 'ssP11TX889fr2m3uC25kLg0vPiOWkWWVGt4sVpjxrtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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