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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e341997ea732d7b11338ecd1e98976bb6095bf1018fad2f571a25d7a3651e859' 
  AND token = 'qfzK2qtcNj7HdT9SVIQ6Rk/wsska9XtWiXT54i9rj0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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