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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ee6ced3d221c537d9b5fb2aecf2d366d72e83c787cb87b6cc61629b18bfacb5e' 
  AND token = 'dyAlYhEuMuMSmNBGMb4ckY6rpoSuQcWQMJgsgu01L4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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