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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85b32b91e994700e33f4405fe28fb1bbb5b07797e4ed10a7ac863c180e3b6d47' 
  AND token = 'MiJ7RkbvL1UhBLO4znyMt04Z6ZGEzqBXKn19gt3pOWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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