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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17e8442638e2d10d7593f9c62c01cd401d5c4c9ddd4d3d7bc55d795801c3fab3' 
  AND token = 'quOaCCA73/IlzSIwkVhcoWm8PbCD/TE/RdcO7q2LpR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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