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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1005457cdb8e37995b54289391c34e191e6626e2c205ca05d90d88805de93267' 
  AND token = '/CFF70QQdhr+gBsMY5con1+y0LYIDoYIxDqhIM+d00s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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