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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a05caffcc5bd09c7266dc09fc91b88880eaa08f414af9141f1444556f2505470' 
  AND token = 'x/DfbMNVWZ1oPqtlmL0sSKFH9foa3n2u7PEWdD6seqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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