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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62725f92a697d40bfac6f4dcbdf7e76b1d608d5c83fb3338375faaa676b3628a' 
  AND token = 'hnlS8GXz7wJHuOkkb5I+InXSZKb/UirSh2u3TrHMkdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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