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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3c4a586a5b8ca13da5154c16de8acf46ea8a5c873687b48dfac682c8921cfdc' 
  AND token = 'YVXXMmWqtxw78YiC9f2LdY9geJrreBkmmSH1AvQ2w0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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