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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d971d5893174fd8580c80a5f76bf86503d0c9a658b6f677a4269555e9ed0aab' 
  AND token = 'd07VGywtef8crhteTtII0MR7FaL9j7p8Olgu1okg1DM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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