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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '097f054deac5ca7835f268d1912aafe8d0558a702882a035aded79b0fe196dd8' 
  AND token = 'Po6qh3/2loqXUESCWNiqE9Fknq7Ez07jl1DLAfuDEfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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