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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51153a84809b0e841c956894a3100ee3dfc0150f9d632da5cf592c3516e4df58' 
  AND token = 'vGHI0xsnMeheLrmu9Ai0pI1lQ4ZmX2YRrSbG0laiujs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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