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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8223f074b0920f91d67a34fbaf8d26a7fe8526cc567929c28197da3cc22e3583' 
  AND token = 'Bc+zranvd+QPakAPZQ6tdHXVHi/HJv7TcolfWc/0Mvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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