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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1f5eab6a777768207fbbaea6682f914cca510e7616edc100ecef08cbd8baf0d' 
  AND token = 'iPQaMqe8SJ86Nqr7OUsifYD0FcKaCNqPKMxf3nhTysA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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