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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80a1911e191dee914c52ccfc8def0773bba79dad27f832d96cb3d09dd5a6cf8d' 
  AND token = 's1jbn+O6ikYuqhREt22LC1uXCf8ZZYORn/Ejh1vwk8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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