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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5fea32a6d622fbcf1f3debdfa9a4828e7758a46e8175b7b098bfdcfa83a22ea4' 
  AND token = 'DLs611xZJaOPjHKKisa2QJ8YQBR9HJ1WeE2zYbriOkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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