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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adfc41fdcb80eb6370c85f96e0cf2df08e919736cefc8f2fb03c33415c9f7be8' 
  AND token = 'K5t6pkxYeCQd/4PCGxdz2OWMZeSCuB+zFS3eg0dlvfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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