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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b906425f49a43d40492a0e3317995c6d05cfa0a04ef1549ee5069da02cb5259a' 
  AND token = 'FqE6S03XFlgE6Wui0+3/4RWWUOH4jSxY67O3Q256Y3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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