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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '865e5a7b126e1a7de3b79cb74edaca957140f8178870cdbdf829502d55407b4b' 
  AND token = 'Y+41HqyBeZs2zCHSHXDSY0ZiNWQ1L6D37WT0WTWOopg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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