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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c146b1078b14c441dd48cb63f088180cf182a1bc85ab5d2f37c5a2b891317ef' 
  AND token = 'VDnKkg9E8I4LoziGbp/zt3cdOmYLHBSEoBC6R6OPArk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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