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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7f4df5327da488636d1baba8022bb256e1b2ba714b433e051b3225c012e4e1c4' 
  AND token = 'DsoAY9FPgfyXIixJFyAaTYZ+Wwz1XoEAbmmvfRzYN30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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