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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97746b5e686871c0faa4adc5ab1988bd049d9bf8ac1ba2caef1bd8df90569fe5' 
  AND token = 'QVWca0z/0+FcgsNNt0DZTWH422lVFdmWUVXytWfLOYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

JSON explain

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