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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a96a87624c8c6be61a04995052371aa49eea72ac9455d9716e4df2d68870c838' 
  AND token = 'FPzpM58VeZ5I2Q5l8JnGZw/g+ry/kAEvOnJ+21+yZQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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