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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9541f6b3a45dcfd3e7ecfcdf38a332eaf7c7b7c82c2f1ff1825947f1c886e32d' 
  AND token = '4nWe1f9dESO4umM1lpfsq3gj7efTCAtnFbffN/94QfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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