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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b701529f4d9aefbc1a18c2ff9fdc840afa2de018cb1963e4fe969aa21b8160bf' 
  AND token = 'KtJYlP/d3KgC6sZPWm9Lm/400/5yM0beqf/Njh6LLZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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