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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96d7744116b81163aa3ad10e725861d4e0101914db675065b774af1e7b819d23' 
  AND token = 'I0B9N/xdKx3ETMKIHUCHw0YFRRyRWfbL6zZpIzcJAMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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