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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ba670bc86b493604ee5de40b27bfbdd2b78485754d20aab60027f71dc1f0c1f' 
  AND token = 'LWNMUBcs4k/f6/fAX0iGEMaMLnqxdOANjUONYkJmRH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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