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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae1b90c7c6c44b4a98fa0b35bbb6aa64559d4583b02cb7c5b5e9f1a5a97aa8f9' 
  AND token = 'sC5ntscw7zrYVR2E+ASE6/MRl4Ptf8R5AedqqjUSEXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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