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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e32106a0416aab935f4fb1e65adc4655faadf95e53e63986c20c2e13a5b712ed' 
  AND token = '2Hb2htNt8LuOmwaF1RlOvJ8ytMhQt8/tBLUp823N1w0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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