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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eece5567d434a68feb375c0de2efe80156328e36a79b6ff99ab79611c5b4c908' 
  AND token = 'X72Z6SzMZOZ6fbTvdQJerD8yJdvjtgxN5mLZdJepQA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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