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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e5538f978af132c0eec53d2f236a33d55e7c2788c4c38752e8089857fef125a' 
  AND token = 'uLDfAfFA/JSPEQqj1l6V8wf5b44c59O+q7q4YmpteQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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