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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '13481167c731dfa9bb5c5f8291152643e4e837c5e26c3f1db720728e7e25359a' 
  AND token = 'V8SV6a4VT1WKlISQNoJP/x22F1TnODRJ7LjlY/t9t7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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