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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '807adafa95ea6821741b1e41ae8cff96c99f826ecb4df1889a638f733b91ffc3' 
  AND token = 'Jb3wmWzubUkdOXTkNY1CydRo2vOfRU2h5pmCJkDzVGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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